摘要:Although three years old, Spaceflight Revolution is actually quite timely. This review comes on the heels of the historic SpaceShipOne flights into space and the successful conclusion of NASA’s X-43 scramjet experiments, some of which author David Ashford addresses in his book. Despite the wording of the title, his ideas are not revolutionary but evolutionary. They follow a time-honored sequence of events that other high-dollar, high-technology programs have already trodden—migrating from management under a government agency into the private sector as soon as the program becomes commercially viable.